FIELD: information technologies.
SUBSTANCE: invention refers to inductive perimeter security alarm devices intended for operation with signaling obstacles (SO), used as a mechanical barrier and, simultaneously, as a sensitive unit with the device reacting to change of inductance between SO adjacent metal units. The offered device, in particular, contains the generator of a sinusoidal current, the phase shifter, a generating and receiving outline, a sensitivity regulator, and also synchronous detectors, direct current amplifiers, filters, reactive and active channels module separator.
EFFECT: provision of high-noise immunity; reliability of operation and elimination of malfunctioning.
6 cl, 1 dwg
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